This paper describes a phase calibration method to reduce the acoustic interactions effects which can degrade the projecting performance of transducer arrays. This method is based on the stochastic parallel gradient descent (SPGD) algorithm, which is widely used in adaptive optics. On the basis of the relationship between the driving voltage and the vibration velocity of the transducers, we use SPGD algorithm to modify the driving voltage phases of transducers in each iteration step, eventually the phase discrepancies caused by acoustic interactions could be accurately estimated. The feasibility is validated by the simulation with a planar array consists of 49 circular pistons. Simulation results reveal that the array calibrated by the proposed method can achieve a larger value of the radiation power in the beam scan direction, particularly in the large beam scan angle, small total mechanical impedance situations.
Phase calibration method of transducer arrays considering acoustic interactions
2020-10-14
144374 byte
Conference paper
Electronic Resource
English
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